The weighted average price is calculated by equating the Customer's 15 minute consumption to the relevant 15 minute price on the power exchange. Some of Latvian households do not have meters of the automatic electricity accounting system, which would allow to see the actual consumption by 15 minute intervals, therefore, in order to calculate the consumption in such a situation, Sadales Tīkls applies standard schedules. This means that until a "smart meter" is installed, the weighted average price per kilowatt hour will be the same for all customers, regardless of consumption.